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silent_eugene / RandomGOGGames

// ==UserScript==
// @name RandomGOGGames
// @description Select random game from page of your library on GOG.com
// @author Eugene Pershin
// @match        *://*.gog.com/account*
// @match        *://*.gog.com//account*
// @license MIT
// @version 0.2
// ==/UserScript==
(function () {

  window.onload = () => {
    var button = document.createElement('div');
    button.className = "btn btn--green btn-add-to-cart";
    button.innerText = "Случайная игра";
    button.onclick = function () {
      var elements = document.getElementsByClassName('product-state-holder');
      elements[getRandomInt(0, elements.length) - 1].click();
    };
    document.getElementsByClassName('collection-header')[0].before(button);
  };

  function getRandomInt(min, max) {
    return Math.floor(Math.random() * (max - min + 1)) + min;
  }

}(window));